public class AdjacentTextNodeMerger extends UnaryExpression
operandEFFECTIVE_BOOLEAN_VALUE, EVALUATE_METHOD, EVENT_FEED_METHOD, INHERITED_CONTEXT, INSPECTION_CONTEXT, ITEM_FEED_METHOD, ITERATE_METHOD, locationId, MAX_SEQUENCE_LENGTH, MAX_STRING_LENGTH, NAVIGATION_CONTEXT, NODE_VALUE_CONTEXT, PROCESS_METHOD, PUSH_SELECTION, staticProperties, UNBOUNDED_LOWER, UNBOUNDED_UPPER, W3C_CONSUMING, W3C_FREE_RANGING, W3C_GROUP_CONSUMING, W3C_MOTIONLESS, WATCH_METHOD| Constructor and Description |
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AdjacentTextNodeMerger(Expression p0) |
| Modifier and Type | Method and Description |
|---|---|
int |
computeCardinality()
Determine the static cardinality.
|
Expression |
copy()
Copy an expression.
|
ExpressionCompiler |
getExpressionCompiler()
Return the compiler relating to a particular expression
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String |
getExpressionName()
Get a name identifying the kind of expression, in terms meaningful to a user.
|
int |
getImplementationMethod()
An implementation of Expression must provide at least one of the methods evaluateItem(), iterate(), or process().
|
ItemType |
getItemType(TypeHierarchy th)
Determine the data type of the expression, if possible.
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int |
getStreamability(int syntacticContext,
boolean allowExtensions,
List<String> reasons)
Get the "sweep" of this expression as defined in the W3C streamability specifications.
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AdjacentTextNodeMergerAdjunct |
getStreamingAdjunct()
Get a class that supports streamed evaluation of this expression
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static boolean |
isTextNode(Item item)
Ask whether an item is a text node
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SequenceIterator |
iterate(XPathContext context)
Return an Iterator to iterate over the values of a sequence.
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static Expression |
makeAdjacentTextNodeMerger(Expression base)
Make an AdjacentTextNodeMerger expression with a given operand, or a simpler equivalent expression if appropriate
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void |
process(XPathContext context,
int locationId,
int options)
Process the instruction, without returning any tail calls
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Expression |
simplify(ExpressionVisitor visitor)
Simplify an expression
|
Expression |
typeCheck(ExpressionVisitor visitor,
ExpressionVisitor.ContextItemType contextItemType)
Type-check the expression.
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computeSpecialProperties, displayOperator, equals, explain, getBaseExpression, hashCode, iterateSubExpressions, optimize, promote, replaceSubExpression, toStringaddToPathMap, adoptChildExpression, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeStaticProperties, doPromotion, dynamicError, effectiveBooleanValue, evaluateAsString, evaluateItem, evaluatePendingUpdates, explain, getCardinality, getColumnNumber, getColumnNumber, getConstructType, getContainer, getDependencies, getEvaluationMethod, getExecutable, getHostLanguage, getIntegerBounds, getIntrinsicDependencies, getLineNumber, getLineNumber, getLocationId, getLocationProvider, getObjectName, getProperties, getProperty, getPublicId, getSlotsUsed, getSpecialProperties, getSystemId, getSystemId, hasVariableBinding, implementsStaticTypeCheck, isSubtreeExpression, isUpdatingExpression, isVacuousExpression, iterateEvents, iterateSubExpressionInfo, markTailFunctionCalls, process, resetLocalStaticProperties, setContainer, setEvaluationMethod, setFiltered, setFlattened, setLocationId, staticTypeCheck, suppressValidation, toPattern, toStreamingPattern, typeErrorpublic AdjacentTextNodeMerger(Expression p0)
public static Expression makeAdjacentTextNodeMerger(Expression base)
base - the operand expressionpublic Expression simplify(ExpressionVisitor visitor) throws XPathException
UnaryExpressionsimplify in class UnaryExpressionvisitor - an expression visitorXPathException - if an error is discovered during expression
rewritingpublic Expression typeCheck(ExpressionVisitor visitor, ExpressionVisitor.ContextItemType contextItemType) throws XPathException
UnaryExpressiontypeCheck in class UnaryExpressionvisitor - an expression visitorcontextItemType - the static type of "." at the point where this expression is invoked.
The parameter is set to null if it is known statically that the context item will be undefined.
If the type of the context item is not known statically, the argument is set to
Type.ITEM_TYPEXPathException - if an error is discovered during this phase
(typically a type error)public ItemType getItemType(TypeHierarchy th)
getItemType in class UnaryExpressionth - the type hierarchy cachepublic int computeCardinality()
UnaryExpressioncomputeCardinality in class UnaryExpressionStaticProperty.ALLOWS_ZERO_OR_ONE,
StaticProperty.EXACTLY_ONE, StaticProperty.ALLOWS_ONE_OR_MORE,
StaticProperty.ALLOWS_ZERO_OR_MOREpublic Expression copy()
copy in class Expressionpublic int getImplementationMethod()
getImplementationMethod in class ExpressionExpression.ITERATE_METHOD or Expression.EVALUATE_METHOD or
Expression.PROCESS_METHODpublic ExpressionCompiler getExpressionCompiler()
ExpressiongetExpressionCompiler in class Expressionpublic int getStreamability(int syntacticContext,
boolean allowExtensions,
List<String> reasons)
ExpressiongetStreamability in class ExpressionsyntacticContext - one of the values Expression.NAVIGATION_CONTEXT,
Expression.NODE_VALUE_CONTEXT, Expression.INHERITED_CONTEXT, Expression.INSPECTION_CONTEXTallowExtensions - if false, the definition of "guaranteed streamability" in the
W3C specification is used. If true, Saxon extensions are permitted, which make somereasons - the caller may supply a list, in which case the implementation may add to this
list a message explaining why the construct is not streamable, suitable for inclusion in an
error message.Expression.W3C_MOTIONLESS, Expression.W3C_CONSUMING,
Expression.W3C_GROUP_CONSUMING, Expression.W3C_FREE_RANGINGpublic AdjacentTextNodeMergerAdjunct getStreamingAdjunct()
ExpressiongetStreamingAdjunct in class Expressionpublic SequenceIterator iterate(XPathContext context) throws XPathException
iterate in class Expressioncontext - supplies the context for evaluationXPathException - if any dynamic error occurs evaluating the
expressionpublic void process(XPathContext context, int locationId, int options) throws XPathException
context - The dynamic context, giving access to the current node,
the current variables, etc.XPathExceptionpublic String getExpressionName()
ExpressiongetExpressionName in class Expressionpublic static boolean isTextNode(Item item)
item - the item in questionCopyright (c) 2004-2013 Saxonica Limited. All rights reserved.